

When the Clone Wars broke out between the Galactic Republic and the Confederacy of Independent Systems, Boss took his place in the Grand Army's Special Operations Brigade under Jedi General Arligan Zey, and served alongside his clone brothers in Delta Squad on a number of battlefields, ranging from the deserts of Geonosis, the halls of the RAS Prosecutor, and the streets of Coruscant, to snowy Mygeeto and the plains of Haurgab. Placed in command of three other commandos, Boss led the elite special forces unit Delta Squad as their sergeant. Born in 32 BBY on the watery world of Kamino, Boss was trained by the Mandalorian Cuy'val Dar training sergeant Walon Vau to become a clone commando in the Grand Army of the Republic. RC-01/138-simplified as RC-1138 and also known as Delta-38 or by his nickname of Boss, then known as IC-1138 as part of the Imperial Commando Special Unit, was a clone of Mandalorian bounty hunter Jango Fett. " Alone against all these droids… Heh, they don't stand a chance." ―RC-1138
